Match photo selection and rendered canvas to device rotation

pigway_frame_flow/renderers/frame_geometry.py

@@ -0,0 +1,10 @@
+"""Resolve a device's visual canvas without coupling rendering to its driver."""
+
+
+def frame_canvas(display, orientation=None):
+    width, height = display.width, display.height
+    if orientation == "landscape":
+        return max(width, height), min(width, height)
+    if orientation == "portrait":
+        return min(width, height), max(width, height)
+    return (height, width) if display.rotation % 180 == 90 else (width, height)

pigway_frame_flow/renderers/photo_caption.py

@@ -7,23 +7,40 @@ from PIL import Image, ImageDraw
 from pigway_frame_flow.renderers.images import convert
 
 
-def render_captioned_photo(data, caption, font_loader, fit="contain", profile="color"):
-    photo_data = convert(data, fit, profile, size=(1200, 1280))
-    canvas = Image.new("RGB", (1200, 1600), "white")
+def render_captioned_photo(
+    data, caption, font_loader, fit="contain", profile="color", *, size=(1200, 1600)
+):
+    width, height = size
+    landscape = width > height
+    caption_height = 240 if landscape else 320
+    photo_height = height - caption_height
+    photo_data = convert(data, fit, profile, size=(width, photo_height))
+    canvas = Image.new("RGB", size, "white")
     with Image.open(BytesIO(photo_data)) as photo:
         canvas.paste(photo, (0, 0))
     draw = ImageDraw.Draw(canvas)
-    lines = [(caption["title"], 1320, 52), (caption["date"], 1410, 40)]
-    if caption.get("place"):
-        lines.append((caption["place"], 1480, 38))
-    for text, y, size in lines:
-        font = font_loader(size)
-        while size > 24 and draw.textlength(text, font=font) > 1080:
-            size -= 2
-            font = font_loader(size)
-        while draw.textlength(text, font=font) > 1080 and text:
+    rows = (
+        [(24, 44), (88, 36), (140, 34)]
+        if landscape
+        else [(40, 52), (130, 40), (200, 38)]
+    )
+    values = [caption["title"], caption["date"], caption.get("place", "")]
+    for text, (offset, font_size) in zip(values, rows, strict=True):
+        if not text:
+            continue
+        font = font_loader(font_size)
+        while font_size > 24 and draw.textlength(text, font=font) > width - 120:
+            font_size -= 2
+            font = font_loader(font_size)
+        while draw.textlength(text, font=font) > width - 120 and text:
             text = text[:-2] + "…"
-        draw.text((600, y), text, font=font, fill="black", anchor="mt")
+        draw.text(
+            (width / 2, photo_height + offset),
+            text,
+            font=font,
+            fill="black",
+            anchor="mt",
+        )
     out = BytesIO()
     canvas.save(out, "JPEG", quality=93, optimize=True)
     return out.getvalue()